These authors contributed equally to this work.
ABA promotes quiescence of the quiescent centre and suppresses stem cell differentiation in the Arabidopsis primary root meristem
Article first published online: 26 OCT 2010
© 2010 The Authors. The Plant Journal © 2010 Blackwell Publishing Ltd
The Plant Journal
Volume 64, Issue 5, pages 764–774, December 2010
How to Cite
Zhang, H., Han, W., De Smet, I., Talboys, P., Loya, R., Hassan, A., Rong, H., Jürgens, G., Paul Knox, J. and Wang, M.-H. (2010), ABA promotes quiescence of the quiescent centre and suppresses stem cell differentiation in the Arabidopsis primary root meristem. The Plant Journal, 64: 764–774. doi: 10.1111/j.1365-313X.2010.04367.x
- Issue published online: 24 NOV 2010
- Article first published online: 26 OCT 2010
- Accepted manuscript online: 16 SEP 2010 01:54AM EST
- Received 22 July 2010; revised 4 September 2010; accepted 8 September 2010; published online 26 October 2010.
- stem cell;
- root meristem;
It is well known that abscisic acid (ABA) can halt meristems for long periods without loss of meristem function, and can also promote root growth at low concentrations, but the mechanisms underlying such regulation are largely unknown. Here we show that ABA promotes stem cell maintenance in Arabidopsis root meristems by both promoting the quiescence of the quiescent centre (QC) and suppressing the differentiation of stem cells and their daughters. We demonstrate that these two mechanisms of regulation by ABA involve distinct pathways, and identify components in each pathway. Our findings demonstrate a cellular mechanism for a positive role for ABA in promoting root meristem maintenance and root growth in Arabidopsis.